The $B \to D^\ast\ell\nu$ semileptonic decay at nonzero recoil and its implications for $|V_{cb}|$ and $R(D^\ast)$
A.V. Avilés-Casco*,
C. DeTar,
A.X. El-Khadra,
A. Kronfeld,
J. Laiho,
R. Van de Water on behalf of Fermilab Lattice and MILC Collaborations*: corresponding author
Pre-published on:
January 03, 2020
Published on:
August 27, 2020
Abstract
We present preliminary results from our analysis of the form factors for $B\to D^\ast\ell\nu$ decay at nonzero recoil. Our analysis includes 15 MILC asqtad ensembles with $N_f=2+1$ flavors of sea quarks and lattice spacings ranging from $a\approx 0.15$ fm down to $0.045$ fm. The valence light quarks employ the asqtad action, whereas the $b$ and $c$ quarks are treated using the Fermilab action. We discuss the impact that our results will have on $|V_{cb}|$ and $R(D^\ast)$.
DOI: https://doi.org/10.22323/1.363.0049
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